Is the $1,680 retiree cash rebate from IRS Sec 408 legit as declared in newsletter solicitation? Spam email offers insights in special pamphlets with subscription to Oxford material.
This is probably a sideways reference to 26 U.S. Code § 408 - Individual retirement accounts, the laws governing IRAs and contributions made under that heading. The rules associated with IRAs are well publicized, and any reputable tax preparation service will take your IRA contributions / withdrawals into account when filing your tax return.
Regardless of where this solicitation came from, they're looking to charge you for information which is publicly available, and I would recommend that you just ignore it. If you want to read up more on "IRS deductions and refunds for IRAs", you can do a web search and learn everything that they would tell you, for no money other than the cost of your internet service.